text: # creating while loop
  while True:
      # printing the available options
      print("1. Addition")
      print("2. Subtraction")
      print("3. Multiplication")
      print("4. Division")
      print("5. Exit")
      # asking user to Enter his choice
      choice = int(input("Enter your choice: "))
      # checking the choice between 1 and 4
      if (choice>=1 and choice<=4):
          # asking to enter two options
          print("Enter two numbers: ")
          # accepting first number
          num1 = int(input())
          # accepting second number
          num2 = int(input())
          # checking if number is 1
          if choice == 1:
              # adding
              res = num1 + num2
              # printing Addition
              print("Result = ", res)
          # checking if number is 2
          elif choice == 2:
              # Subtracting
              res = num1 - num2
              # printing Subtraction
              print("Result = ", res)
          # checking if number is 3
          elif choice == 3:
              # Multiplication
              res = num1 * num2
              # printing Result
              print("Result = ", res)
          # after checking all 3 choice,
          # only one operation left, i.e. for Division
          else:
              # Division
              res = num1 / num2
              # printing Result
              print("Result = ", res)
      # checking if the choice is 5
      elif choice == 5:
          # if choice is 5, we will exit the program
          exit()
      # everything, except the five choices is useless
      # so, we will print Wrong input..!!
      else:
          print("Wrong input..!!")